PATHOLOGY

Detailed explanation-1: -The pineal gland, conarium, or epiphysis cerebri, is a small endocrine gland in the brain of most vertebrates. The pineal gland produces melatonin, a serotonin-derived hormone which modulates sleep patterns in both circadian and seasonal cycles. The shape of the gland resembles a pine cone, which gives it its name.

Detailed explanation-2: -The pineal gland is a very small gland in the centre of the brain shaped like a pine cone, which is where it gets its name. It is part of the endocrine system. It produces a hormone called melatonin.